Originally Posted by
Mansion
The problem about Noct AST is not its potency, it's just that shielding in general is less powerful than regens. SCH is not the prefered healer for its shields, but because of its oGCD heals and DPS / raid contribution. For example, unless a fight requires a special shield value, you could go WHM / diurnal AST and survive just fine.
Trying to make double AST viable like you did is valuable but it's far too OP like this, even if the enemy debuffs are shorter.
I like your new Spire, but I think it kinda messes up with some rotations (I just think about BLM AStral Fire and Foul / Thundercloud timings and PLD Requiescat / Holy Spirit right now), which revolve around X number of spells cast fitting into a buff or whatever, and being out of MP forces you out of this phase. But I don't know how detrimental this would be... seems okay.
Maybe MP will be consumed differently in 5.0 for other classes so it could work anyway.